CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME
Net (loss) income	$ (11,633)us-gaap_NetIncomeLoss	$ 17,939us-gaap_NetIncomeLoss
Unrealized gains (losses) on available-for-sale securities:
Unrealized gains (losses) during period, net of taxes	22	(10)
Net unrealized gains (losses) on available-for-sale securities	22	(10)
Comprehensive (loss) income	$ (11,611)us-gaap_ComprehensiveIncomeNetOfTax	$ 17,929us-gaap_ComprehensiveIncomeNetOfTax

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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